Although exposure to asbestos is the primary cause of mesothelioma, a slow-developing
cancer, researchers believe that infection by the SV40 virus is a contributing cause, since
in the United States 60 percent of tissue samples from mesotheliomas, but none from
healthy tissue, contain SV40

please see the above para.
whats the meaning of "since
in the United States 60 percent of tissue samples from mesotheliomas, but none from
healthy tissue, contain SV40" ?

i am confusing as the para has too many commas.
does it want to say 60 percent of tissue samples contain SV40

I know that asbestos is dangerous for workers and people who come into contact with it. Our house was built in 1952 and has asbestos siding. My parents swear that it’s fine because it is not falling apart. I’m extremely worried and I stress about it every day. I have a huge fear of lung cancer after our grandmother died from it a year ago. I’m getting professional help but it’s not working. Any advice?

I was hanging a light in the student center pub today, and I pushed up the ceiling tile to get a wire out from behind it and a piece of the ceiling fell into my eye. I washed it out after it happened, but should I be worried about anything?

Alternative cures for lung cancer with best cure rates

Been working for 3 1/2 years at this place and after the first year is when everything started. Had pneumonia 3 times in 1 year. Took antibiotics and steroids. Felt better for 3-5 weeks. Then the same symptoms come back. Docs say that it could be chronic bronchitis or COPD I don’t even smoke. Took a leave of absence for a short time while feeling better and had no problems, then finally went back to work and the very first day, everything started started over again. I work underneath a vent and I have heard that the building might have asbestos in it. Could this building be making me sick?

A cloud of asbestos dust covered my suit cases, clothes, movies, computers, some books and stuff. Can I wipe the possibly contaminated dust off with a damp rag and avoid inhaling any more of these particles in the future? What’s the best way to clean it off my stuff?

I had to fix some things in my Grandmas house, which was built in 1954. I took out the heater and cut out dry wall to replace some ceiling tiles. When I ripped them out I’m not a hundred percent I didn’t just eat a face full of asbestos insulation and a pretty thick layer of dirt just covered everything in the living room. I’m not sure, but I’d wager there is a good chance the tiles and insulation are made from the cheapest materials available in 1954, which is probably asbestos. I know the outside paneling is made out of asbestos, I did have to drill through it in a couple places, but I held my breath. I may die from mesothilioma, but at least grandma can sell her house.